p {
    /* color: darkred;
    font-style: italic;
    font-weight: lighter;
    font-size: 20px;
    font-family: "黑体"; */
    /* font:italic lighter 20px "黑体"; */
    font: 20px "黑体";
    color: black;
    text-indent: 2em;
    line-height: 30px;
    letter-spacing: 3px;
}

.red {
    color: darkblue;
}

#history {
    color: dodgerblue;
}

h1 {
    text-align: center;
}

a {
    text-decoration: none;
}